Identify the colloidal molecule containing a hydrophilic head and a hydrophobic tail.

Which metal sol cannot be prepared by Bredig's arc method?

Which of the following is not an emulsifier?

Which of the following cations will have the minimum flocculation value for arsenic sulphide sol?

$100 \ mL$ of $0.0018\%(w/v)$ solution of $Cl^{-}$ ion was the minimum concentration of $Cl^{-}$ required to precipitate a negative sol in one $h$. The coagulating value of $Cl^{-}$ ion is $.......$ (Nearest integer).

Which of the following makes the lyophilic solution unstable?